The invention relates to the field of production of rubber auxiliaries and in particular discloses a method for continuously preparing tetrabenzylthiuramdisulfide by utilizing a microreaction device. The method for continuously preparing tetrabenzylthiuramdisulfide by utilizing the microreaction device is characterized in that carbon disulfide and a solution obtained by mixing dibenzylamine and a solvent are fed into a micromixer in the microreaction device by virtue of a metering pump, are fully mixed and then are fed into a microreactor in the microreaction device for carrying out condensation reaction, so that a dibenzyl dithioformic acid solution is obtained; and the dibenzyl dithioformic acid solution and hydrogen peroxide are fed into the micromixer by virtue of the metering pump, are fully mixed and then are fed into the microreactor for carrying out oxidation reaction, and filtering and drying are carried out, so that tetrabenzylthiuramdisulfide is obtained. The method disclosed by the invention has the advantages that raw materials required by reaction are fewer, the reactant conversion rate is higher, byproducts are fewer, the reaction selectivity is higher, and the product quality is excellent.